Mechanical stoker.



H. MAGN- PARSON. MECHANICAL s'rom. APPLICATION FILED NOV. 22, 1906.

rdtented May 28, 1912.

4 SHEETS-SHEET 1.

H. MAON- PARSON. MECHANICAL STOKER.

- APPLICATION FILED NOV. 22, 1906. 1,027,753. V Patented May 28. 1912.

Q4 SHEETS-SHEET 2.

17210; We: Mali)?! 7'60?! witnuoeo H. MAON. PARSON. MECHANICAL STOKER.

APPLIUATION runnnov. 22, 1906.

Paitented May 28, 1912.

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M ay m a H. MAGN. PARSON. MECHANICAL STOKER.

APPLICATION FILED NOV. 22". on 1,027,753.

Patented May 28, 1912;

4 SHEETS-SHEET 4.

UNITED STATES PATENT'OFFICE.

HENRY MACNITTT mason, or NEW Y'onK, n. Y., assrenon 'ro reason nanosecronme oommny, or NEW YORK, n. Y., A CORPORATION" or NEW YORK.

MECHANICAL STOKER.

- Specification of Letters Patent.

Patented. May 28,1912.

-App1ioation filed November 22, 190 6. Serial No. 344,606.

To all whom it may concern: I

Be it known that I, HENRY MAoNU'r'r PARSON, citizen of the United States of America, and resident of the city, county, and State of New York, have invented certain new and useful Improvements in Mechanical Stoker's, of which the following is a specification.

My invention relates to a mechanical stoker, the structure of which is simpler, more durable, and better protected from the effects of heat, and the operation of which is moreeflicient and less complicated in action than that of the-mechanical stokers heretofore in use.

Various features of my device, which are herein shown and described but not claimed,

are shown, described and claimed in my copending application, Serial No. 344,605,

filed November 22nd, 1906. The construct-ion of my stoker is such that the fuel is fed with regularity to the gratefin the-form of particles of coke of substantially uniform size.

Difliculty has been experienced in break-.

ing fuel which has been coked within the furnace, into particles of substantially uniform size, and 1n feeding the same with regularity toall points of the upper end of the grate. Those coke breakers heretofore in usehave beenunreliable or unsatisfactory in that they have either not properly broken the coke, or have impeded the flow of the same to the grate,and furthermore have been complicated in operation.

I have invented a novel means for breaking and feeding the fuel to thegrate, consisting preferably of a reciprocating bar, which acts, first, as a part of the coking surface, to allow the fuel to coke in a sheet over it, and then, by receding and advancing, to withdraw its support from the sheet of coke, crack the sheet on a'line parallel to the grate, and feed the same in a crumpled. mass evenly to all points of the top of the grate.

Having 'set forth the objects and nature of my invention, I will now describe an embodiment of the same in connection with the accompanying drawings in which- Figure I is a View in cross-sectional ele-' vation of my assembled stoker, Fig. II is a plan view of the same, partly broken away to show the grate bar supports. Fig.

piece 19, and onflthe stationary grate section 21-. When in its III aview in cross-sectional elevation of my assembled coke breaking device. Fig. IV is a top plan detailyiew of the coke breaker plate. Fig. V is a cross-sectional View on the line 55 of Fig/IV.

Referring to the drawings, in Fig. I the front wallof the furnace is indicated by 1.

Located in front of the wall 1, is the coal hopper 2, communicating with the interior of the furnace through the opening 3. Be-

low the mouth of the hopper is a guide plate 4 for directing the fuel toward the opening 3, and operating below and in, front of the guide plate 4:, and in guideways 5, is a fuel feeder or pusher 6. This feeder reciprocates in its guideways and is operated from the power shaft 7 by means of crank arms 8, connecting rods '9, bell crank levers 10 on shaftll and rods 12 pivotally connected to the feeder orv pusher 6. As is common in the art,'provision is made for varying the stroke of the pusher 6 by'means of a sleeve 13, mounted loosely on the rod 9 and attached to the arm H of the' bell crank lever 10. The lost motion thus provided for between the rod 9 and the bell crank lever 10, is adjusted at will by means of a nut 15, threaded to engage the rod 9 and to be locked at any desired position thereon by a lock nut 16.

Immediately within the opening 3 of the furnace, is a plate 17 supported on the stoker frame sidepiece 19, which together with the plate 20 of the coke breaker (see Fig. IV) forms a coking surface for the fuel fed through the opening 3 before such fuel is fed to the-grate below. The plate 20 of the coke breaker when in its normal position forms, as just mentioned, in effect a section of the coking surface. 'This plate rests loosely upon bar 21' and engages the forward face of the latter by means of its webs 22, and the rear face thereof by means of a flange 23. The bar 21, is mounted to slide upon guideways 24. on the frame side rear face of the upper normal posltion the plate 20 lies partially under the plate 17 and rests at its forward end on the top of the grate section 21. By sliding the bar 21' outward so that the rear end of the plate 20 lies beyond the forward end of the plate 17, the plate 20 may be hffied ofiz'the bar21, This ready means of 7 through the 7 per 2 into the pathof the taching the plate 20 from the bar 21" is very useful, as in the event of injury by heat or otherwise to the plate 20, it may be easily replaced. In order that, if in case the plate 20 be but slightly injured, it need not be entirely lost, it is preferably made in sections of less length than.the ,bar 21: and only the sections injured need be replaced. The upper surface of the plate 20, it will be noted, is so'shaped as to present a pair of longitudinal ridges 25 and 26. The function of these ridges is to impede the passage of the fuel over the coking surface, and to hold the fuel on the coking surface until it is coked and ejected therefrom by the breaker. That the ridges or projections 25 and-26 may not be injured by heat, a series of twyers or air holes 27 (see Fig. V) is provided be tween the projections 25 and 26, and on either side of projection 25.

The breaker bar 21f reciprocates in its guide ways, carrying with it the plate 20, by virtue of the connecting rods 28 threaded uprights 29 of the bar 21', and passing through openings 30 in the front plate of the furnace into outwardly extending elongated bearings 31 with which they have sliding engagement by virtue of packing 32. The rods 28 receive movement from the power shaft 7 by means of crank arms 33 and connecting rods 34, adjustably con nected with the rods 28 whereby the'throw of the latter may be varied.

- In operation the fuel drops from the hoppusher 6, by which it is forced through the opening 3 of the furnace and falls across the coking surface.

topics 01' this patent may be obtained for At this moment the coke breaker is in the position indicated in Fig. I and the projected ridges thereon serve to arrest the passage gf the fuel across it. In this'p osition the fuel is subjected to the intense heat of the furnace Without suificient draft and is coked. The movement of the coke breaker shaft now causes the coke breaker to recede and Withdraw its support from the fuel coking above it, whereupon the sheet of coke cracks longitudinally on the line of the coke breaker and partially collapses into the re cess left as the coke breaker recedes: the coke breaker then advancing engages the broken sheet of coke and turns 01' forces the five cents each, by addressi Washington, D. O. a

same over on to the grate in a thoroughly broken condition.

Although I have described in detail the structure which now appears tome as the preferable embodiment of my invention, yet it is obvious that the particular structure shown is capable of. considerable variation within the scope of the invention.

Having thus described my invention what I claim and desire to secure by Letters Patent is f 1. In a mechanical stoker, having a coking surface, a reciprocating coke breaking bar or plate beneath the coking plate normally substantially flush with the coking surface, the face of the reciprocating bar having a series of projections thereon to.

impede the passage of the fuel across the h same.

same, and air holes between said projections for cooling the same. v 3. In a mechanical stoker, a coking plate having a coking surface, a coke-breaker coacting therewith, the coke-breaker comprising a reciprocating bar and a movable transverse supporting bar with which the reciprocating bar is removablyi'nterlocked, the transverse supporting bar having its surface normally substantially flush with the coking surface. r

4. In a'mechanical stoker, a coking plate, a coke-breaker co-acting therewith, the cokebreaker comprising a bar and a movable support with which the bar is loosely interlocked, the plate having on its coke-engaging surface a series of longitudinal ridges with air holes between the same for keeping them cool.

Witnesses:

WENDELLY P. BARKER, WM. L. MORRIS.

g the Commissioner of Patents.

a coking plate.

having a series of projections thereon to impede the'passage of the fuel across the.

Signed by me at New York city, N. Y., 

